Locomotive smoke-box



m0 Modal.

- G. R. HENDERSON.

LOGOMOTIVE SMOKE BOX.

No. 328,674. I Patented Oct. 20, 1885.

Inventor,

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UNITED STATES PATENT Frrcn.

GEORGE R. HENDERSON, OF ALTOONA, PENNSYLVANIA.

LOCOMOTIVE SMOKE-BOX.

SPECIFICATION forming part of Letters Patent No. 328,674, dated October 20, 1885.

Application filed June 15, 1885.

To all whomi t may concern:

Be it known that I, GEORGE R. HENDER- soN, a citizen of the United States, residing at Altoona, county of Blair, State of Pennsylvania, have invented an Improvement in Locomotive SmokeBoxes, of which the following is a full and accurate description, reference being had to the drawings,which form part of this specification.

My invention has reference to locomotives provided with extended smoke boxes in which, as is well known, the unburned coal carried forward and deposited by the blast frequently becomes ignited and so intensely hot as to burn and injure the sheet composing the wall of the extended smoke-box.

The object of my invention is to protect and prevent the injury or destruction of this sheet. This I accomplish by placing in the bottom of the smoke-box a protecting-plate or false bottom, preferably of cast-iron, conforming in general outline to the shape of the box and extended high enough on its sides to protect those parts of plate which are liable to be burned. This protecting-plate, while similar in general outline to the parts of the smoke-box which it protects, does not fit closely upon the plate, but is supported upon it by means of projections or flanges, so as to leave a space between it and the true walls of the sm0ke-box, and this space I prefer to fill with some good non-conducting material.

Reference being now had to the drawings, Figure 1 is a longitudinal section of the front end of a locomotive provided with an extended smoke-box and having my improvement. Fig. 2 is a perspective view of my protecting-plate on the line a b.

A is the protecting-plate; B, the plate composing the true wall of the extended smoke-box. O is the wire-netting which prevents the escape of the unburned coal through the stack. D is the hopper through which the coal, &c., deposited in the extended smoke-box is removed. E is the man-hole in the front of the smoke-box. c c are the projections or flanges by which the protecting-plate A is supported on the wall B of the smoke-box. d d is the space between the protecting-plate and the plate B, and which I prefer to fill with non-conducting material, as shown at d.

The protecting-plate A can be easily and Serial No. 168,697. (NomodeL) cheaply made, and readily inserted in and removed from the smoke-box through the manhole E. It ls of course evident that the protecting-plate A may be made in-two or more pieces, and such a construction may sometimes be advisable to facilitate its removal.

patent this plate is but one of a number of triturating and pulverizing devices which are designed to reduce the cinder to powder and compel its escape from the smoke-box, while in my device the cinder is retained in the box, and the protecting-plate A is provided and arranged, as described, so that the combustion of the coal in the box may not injure its walls.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In the smoke-box of a locomotive or other boiler, the combination of the sheet B, composing the wall or shell of the smokebox, with a protecting-plate, A, so supported on the wall of the smokebox as to leave a space, d, between it and the sheet B, substantially as and for the purpose specified.

2. In the smoke-box of a locomotive or other boiler, the combination of the sheet B, composing the wall or shell of thesmoke-box, with a protecting-plate, A, conforming in general shape to the wall of the smoke-box and separated from it by a layer of non-conducting material, all substantially as and for the purpose specified.

3. In the smoke-box of a locomotive or other boiler, the combination of the plate B, composing the wall or shell of thesmoke-box, with a protecting-plate, A, having ribs or projection 0, whereby it is kept at a distance from the sheet B, substantially as shown and described.

GEO. R. HENDERSON. 

